inner tube

(inner tubesplural)An inner tube is a rubber tube containing air which is inside a car tyre or a bicycle tyre.n-count

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inner

1adjThe inner parts of something are the parts which are contained or are enclosed inside the other parts, and which are closest to the centre.ADJ n(Antonym: outer)
Wade stepped inside and closed the inner door behind him.

2adjYour inner feelings are feelings which you have but do not show to other people.ADJ nLoving relationships will give a child an inner sense of security...

inner childSome psychologists refer to a person's childish feelings as his or her inner child.n-singoft poss NFor me, recovery has been all about finding my inner child and accepting her.

inner circle(inner circlesplural)An inner circle is a small group of people within a larger group who have a lot of power, influence, or special information.n-countusu sing, oft N of n...Mr Blair's inner circle of advisers.

inner city(inner citiesplural)You use inner city to refer to the areas in or near the centre of a large city where people live and where there are often social and economic problems.n-count...helping kids deal with the fear of living in the inner city...

inner tube(inner tubesplural)An inner tube is a rubber tube containing air which is inside a car tyre or a bicycle tyre.n-count